JPH0723744U - Sheet position control device for sheet-fed printing press - Google Patents

Abstract

(57) [Summary] [Purpose] Prevents work loss such as mispositioning of the paper position detection means and readjustment, and always keeps the optimum position for the horizontal needle regardless of paper size. Try. [Structure] 1 is a difference plate, 2 is a front pad, and 5 and 6 are horizontal needles and horizontal pads provided on an upper plate 7 of a paper tray, which are movable in the A and B directions according to the paper size. Optical sensors 8 and 9 detect the position of the sheet. When the position of the sheet to be fed is inappropriate, the movable sheet stacking unit of the sheet feeding device is moved in the A and B directions. The optical sensors 8 and 9 are embedded in the upper plate 7 and move integrally with the horizontal needle 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device that regulates the position of a printing sheet in the left-right direction in a sheet feeding device of a sheet-fed printing press.

[0002]

[Prior art]

 In a sheet-fed printing press, a lateral needle device is provided in the register section to print an image (pattern) at a specified and precise position on the paper, and the lateral needle device accurately measures the lateral position of the paper. Regulated. However, depending on the state of the paper that is conveyed from the paper feeding device to the register, there are cases in which accurate position regulation is not always performed. To prevent this, the left and right position of the paper conveyed from the paper feeder to the register is detected, and the paper stack on which the print paper is stacked is moved in the left and right direction with respect to the paper transport direction. A paper position detection sensor for controlling the plate moving means is provided so that the optimum position of the paper is always secured from the paper feeding device to the lateral needle device for conveyance.

An example of this type of device is disclosed in Japanese Utility Model Laid-Open No. 60-119046. That is, the one disclosed here detects the side edge of the printing paper being conveyed toward the printing mechanism section by the photoelectric converter arranged corresponding to the normal operating range of the lateral needle device, and performs photoelectric conversion. The printer pile feeder for printing presses is moved and adjusted in the left-right direction with respect to the transport direction of the printing paper by the driving means connected to the container so that the printing paper can be transported within the allowable operating range of the horizontal needle device. Is.

[0004]

[Problems to be solved by the device]

 By the way, generally, a sheet-fed printing press is capable of printing sheets of a plurality of sizes, and the position of the horizontal needle is changed according to the change of the sheet size. In addition, the printed paper is processed in processes such as cutting and binding, but if the position of the printing unit (image) on the paper is misaligned at that time, the cutting process cannot be performed, so the operator cannot print See and move the position of the horizontal needle. However, like the conventional sheet-fed printing press described above, if the lateral needle device and the photoelectric converter that is the paper position detecting means are separately arranged, the lateral needle device and the paper position detecting device are detected. Since it is not linked with the means, it is extremely difficult and troublesome to set the paper position detecting means to the optimum position in response to the movement of the horizontal needle, which requires time and man-hours for preparation and burdens the operator. There was such a problem.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to prevent work loss such as position setting error and readjustment of the paper position detecting means, and to prevent paper The purpose of the present invention is to provide a paper position regulating device for a printing machine, which can always hold the optimum position for the horizontal needle regardless of the size of the paper.

[0006]

[Means for Solving the Problems]

 In order to achieve this object, a paper position regulating device of a printing machine according to the present invention includes a paper position detecting unit that detects a lateral position of a printing paper and controls a paper stack moving unit, and moves the lateral needle device. Interlock with.

[0007]

[Action]

 According to the present invention, since the paper position detecting unit moves in association with the movement of the horizontal needle device, the positional relationship between the horizontal needle device and the paper position detecting unit is always kept constant.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 is a plan view of a sheet position regulating device of a sheet-fed printing press according to the present invention, FIG. 2 is a side view thereof, FIG. 3 is a side view of a sheet feeding device of a sheet-fed printing press according to the present invention, and FIG. FIG. 5 is a plan view of the main part of the paper device, and FIG. 5 is a plan view of the main part of the paper position regulating device showing a state in which the position of the paper is being detected. In these figures, reference numeral 1 indicates a difference plate which constitutes a register portion, 2 indicates a front pad which is provided at a leading end portion of the difference plate 1 and which aligns the sheet 13 in a vertical direction, and 3 indicates a safety device. 4 is a paper guide.

Reference numerals 5 and 6 denote horizontal needles and horizontal pads provided on the upper plate 7 of the paper tray, which align the lateral alignment of the paper 13. Reference numerals 8 and 9 are optical sensors, which are the paper position detecting portions, which is a feature of the present invention, and are embedded in the upper plate 7 at a slight distance in the A and B directions corresponding to the horizontal pad 6. The optical sensors 8 and 9 are integrated with the lateral needle 5 and the lateral pad 6 via the upper plate 7. 10 is a safety device and 11 is a paper guide.

A reference numeral 12 denotes a sheet feeding device, which is a fixed paper stacking platform 14 suspended by a chain 16 and is movable in the width direction of the paper 13 on the fixed paper stacking platform 14. It is roughly configured by a movable paper stacking base 15 on which the paper 13 is stacked. As the paper 13 is fed to the fixed paper loading tray 14 and the amount of the paper 13 on the movable paper loading tray 15 is reduced, the fixed paper loading tray 14 is automatically raised so that the upper end surface of the loaded paper is It is kept at a certain height.

The fixed paper loading platform 14 is provided with a scale 17 extending in the width direction of the paper 13 (directions of arrows A and B), and the movable paper loading platform 15 has a pointer corresponding to the scale 17. 18 is provided, and the movable paper loading platform 15 is movable in the directions of arrows A and B on the fixed paper loading platform 14 by a conventionally known guide mechanism 19. Reference numeral 21 is a motor attached to a bracket fixed to the fixed paper loading platform 14, 22 is a bevel gear fixed to the motor shaft of the motor 21, 23 is a bevel gear that meshes with the bevel gear 22, and 24 is a bevel gear 23. Reference numeral 25 denotes a threaded rod which is fixed and has a threaded portion 24a formed at its front end, and 25 is a sliding bracket which is fixed to the movable paper loading platform 15 and has a female threaded portion with which the threaded portion 24a of the threaded rod 24 is screwed. When the motor 21 is rotated in the forward and reverse directions, the movable paper loading platform 15 causes the screw rod 24 to rotate via both bevel gears 22 and 23, and the sliding bracket that is screwed into the screw portion 24 a of the screw rod 24. Since the racket 25 moves in the A and B directions, it moves in the A and B directions accordingly.

Next, the sheet position regulating operation of the sheet position regulating device of the sheet-fed printing press having such a configuration will be described. First, prior to the start of printing, the motor 21 is manually operated to set the left and right positions of the sheets 13 stacked in the sheet feeder 12 to a predetermined position while aligning the scale 17 and the pointer 18. Similarly, the upper plate 7 is manually moved in the A and B directions, and the horizontal needle 5 and the horizontal pad 6 are set at predetermined positions according to the size of the paper 13. After that, test printing is performed to determine the optimum position of the image (pattern) on the paper 13.

The position of the paper 13 with respect to the horizontal needle 5 set in this way is determined by the lateral alignment accuracy of the papers 13 stacked in the paper feeder 12. That is, when the paper alignment accuracy is poor, even if the paper 13 is set to the optimum position immediately after the start of printing, the paper 13 is placed horizontally while the printing is in progress as shown in FIG. 5A or 5C. 6 is too close to or too far away, and is in an inappropriate position. In the state of FIG. 9A, the sensors 8 and 9 both detect the sheet 13 and cause the motor 21 to rotate in the reverse direction. By the reverse rotation of the motor 21, the movable paper stacking base 15 moves in the direction of the arrow B, and the sensor 8 does not detect the paper 13 as shown in FIG. On the other hand, when it comes to an appropriate position, the rotation of the motor 21 stops.

On the other hand, in the state shown in FIG. 1C, the optical sensors 8 and 9 are both in the non-detected state of the sheet 13 and the motor 21 is normally rotated. The forward rotation of the motor 21 causes the movable paper stacking base 15 to move in the direction of arrow A, and the sensor 9 detects the paper 13 as shown in FIG. On the other hand, when it comes to an appropriate position, the rotation of the motor 21 stops. Since the timing of the movement of the movable paper loading platform 15 by the optical sensors 8 and 9 ends before the horizontal position of the sheet 13 is set by the horizontal needle 5, the horizontal direction of the sheet 13 by the horizontal needle 5 is set. The position can be set continuously. The optical sensor 9 also detects whether or not the paper 13 is present.

Next, when the size of the paper 13 fed from the paper feeding device 12 is changed, the upper plate 7 is moved in the A and B directions, and the horizontal needle 5 and the horizontal pad 6 are placed on the paper 13. To fit the size of. At this time, the optical sensors 8 and 9 also move integrally with the upper plate 7 and move in conjunction with the horizontal needle 5 and the horizontal pad 6, so that the horizontal needle 5 and the horizontal pad 6 are adjusted to the size of the paper 13. Even if it is moved, the positional relationship with the optical sensors 8 and 9 does not change, so there is no need to adjust the position of the optical sensors 8 and 9 by changing the size of the paper, and the position of the paper position detector with respect to the horizontal needle device is changed. Since it is always in the optimum position, the detection accuracy can be improved. Further, even if the horizontal needle 5 is moved during printing, the optical sensors 8 and 9 move in conjunction with each other, so that the adjustment time and man-hours are reduced, and the occurrence of defective paper can be reduced.

In the present embodiment, the optical sensors 8 and 9 are embedded in the upper plate 7 and fixed integrally with the horizontal needle 5. However, the present invention is not limited to this. The device 12 is movably supported in the left and right directions, and the optical sensors 8 and 9 are connected to the horizontal needle 5 by a connecting member so that the horizontal needle 5 can be moved. You may make it detect a position directly. Further, although the upper plate 7 is manually moved according to the paper size, a control device for issuing a paper size signal is provided, and the control device controls the driving device to move the upper plate 7. May be.

[0017]

[Effect of device]

 As described above, according to the present invention, since the paper position detection unit that detects the position of the printing paper in the left-right direction and controls the paper stack moving unit is moved in conjunction with the horizontal needle device, The positional relationship between the device and the paper position detector is always kept constant, the position setting of the paper position detector is not required, and the setting work is greatly shortened and reduced. Since the position of the detection unit is always at the optimum position, it is possible to improve the detection accuracy. Further, even if the horizontal needle is moved during printing, the paper position detection unit is also interlocked, so the adjustment time and man-hours can be reduced, and the occurrence of defective paper can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a sheet position regulating device of a sheet-fed printing press according to the present invention.

FIG. 2 is a side view of the sheet position regulating device of the sheet-fed printing press according to the present invention.

FIG. 3 is a side view of a sheet feeding device of a sheet-fed printing press according to the present invention.

FIG. 4 is a view on arrow IV in FIG.

FIG. 5 is a main part plan view showing a state in which the position of the sheet is detected in the sheet position regulating device of the sheet-fed printing press according to the present invention.

[Explanation of symbols]

 1 Differential Plate 5 Horizontal Needle 6 Horizontal Pad 7 Upper Plate 8, 9 Optical Sensor 12 Paper Feeding Device 13 Paper 14 Fixed Paper Stack 15 Movable Paper Stack 21 Motor 24 Screw Rod

Claims (1)

[Scope of utility model registration request] 1. A paper feeding device having a paper stacking plate on which printing sheets are stacked and a paper stacking plate moving means for moving the paper stacking plate in the left-right direction with respect to the paper transport direction, and a feeder from the paper feeding device. The lateral position of the printing paper fed onto the board is regulated in the lateral direction and the lateral needle device is supported so as to be movable in the lateral direction, and the lateral position of the printing paper is detected to control the stacking plate moving means. A sheet position restricting device for a sheet-fed printing press, comprising: a sheet position detecting unit, wherein the sheet position detecting unit is interlocked with the movement of the lateral needle device.